JP6406983B2 - 半導体装置およびその製造方法 - Google Patents
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Description
<構成>
図1は、本実施の形態1における半導体装置100の部分断面図である。また、図2は半導体装置100の部分平面図である。図1に示すように、半導体装置100は、絶縁基板5と、放熱部材6と、電極端子3とを備える。絶縁基板5は、絶縁板51と絶縁層の両面に形成された導体パターン52a,52bとを備える。絶縁基板5の放熱面側(導体パターン52b側)には、放熱部材6がはんだ8によって接合されている。絶縁基板5の回路面側(導体パターン52a側)には、電極端子3が超音波接合されている。電極端子3と導体パターン52aとは、接合面3jにおいて超音波接合されている。
図3は本実施の形態1の比較例としての半導体装置10の超音波接合工程を示す図である。図4は、本実施の形態1の半導体装置100の超音波接合工程を示す図である。
図5は、実施の形態1の第1の変形例に係る半導体装置100Aの部分断面図である。半導体装置100において、電極端子3の接合面3jに貫通穴20が1つ設けられた。一方、半導体装置100Aにおいては、電極端子3の接合面3jに4方を囲まれるように、貫通穴20が複数、例えば2つ設けられる。電極端子3に貫通穴20を複数形成することにより、酸化被膜30が貫通穴20の内部に排斥されやすくなる。また、貫通穴20を通して外観を観察できる接合部分も増えるためより好ましい。
図6は、実施の形態1の第2の変形例に係る半導体装置100Bの部分平面図である。電極端子3の貫通した肉抜き部の形状は前述した機能(即ち酸化被膜の排斥および接合部の外観観察)を満たす形状であればどのような形状でもかまわない。例えば、図6に示すように肉抜き部として、電極端子3の先端から端子曲げ部3rに向かってスリット21を設けてもよい。図6に示すように、スリット21は接合面3jに2方を囲まれるように形成されている。なお、スリット21の長さを短くして、スリット21の付け根部分も接合面3jに接するようにしてもよい。この場合、スリット21は3方を接合面3jに囲まれる。
本実施の形態1における半導体装置100は、接合対象物(即ち導体パターン52a)と、接合対象物に接合された電極端子3と、を備え、電極端子3と接合対象物とは、接合に供される接合面3jにおいて超音波接合されており、電極端子3は少なくとも2方を接合面3jに囲まれた貫通した肉抜き部(即ち貫通穴20)を備える。
図7は、本実施の形態2における半導体装置200の部分断面図である。本実施の形態2と実施の形態1(図1、図2)との相違点は、電極端子3を、導体パターン52aに代えて電力用半導体素子1の表面に形成された主電極(即ち表面電極2)に接合したことである。実施の形態1と同様、半導体装置200の電極端子3には肉抜き部が設けられている。本実施の形態2において、肉抜き部は、4方を接合面3jに囲まれた貫通穴20である。
本実施の形態2における半導体装置200は、絶縁板51と、絶縁板51の表面に形成された導体パターン52aとを備える絶縁基板5と、導体パターン52aに接続された半導体素子1と、をさらに備え、接合対象物は、半導体素子1の主電極(即ち表面電極2)である。
Claims (6)
- 接合対象物と、
前記接合対象物に接合された電極端子と、
を備え、
前記電極端子と前記接合対象物とは、接合に供される接合面において超音波接合されており、
前記電極端子は4方を前記接合面に囲まれた少なくとも1つの貫通穴である肉抜き部を備え、
前記電極端子と前記接合対象物とは、前記肉抜き部の周囲において超音波接合されている、
半導体装置。 - 前記少なくとも1つの貫通穴は複数個設けられる、
請求項1に記載の半導体装置。 - 前記電極端子は4方を前記接合面に囲まれた部分のみに、前記肉抜き部を備える、
請求項1または請求項2に記載の半導体装置。 - 絶縁板と、当該絶縁板の表面に形成された導体パターンとを備える絶縁基板をさらに備え、
前記接合対象物は、前記導体パターンである、
請求項1から請求項3のいずれか一項に記載の半導体装置。 - 絶縁板と、当該絶縁板の表面に形成された導体パターンとを備える絶縁基板と、
前記導体パターンに接続された半導体素子と、
をさらに備え、
前記接合対象物は、前記半導体素子の主電極である、
請求項1から請求項3のいずれか一項に記載の半導体装置。 - 請求項1に記載の半導体装置の製造方法であって、
前記電極端子の一部を肉抜きして前記肉抜き部を形成する工程と、
前記接合対象物を超音波接合装置に固定する工程と、
前記接合対象物に、前記肉抜き部が形成された前記電極端子を載置する工程と、
前記電極端子の前記接合面の反対側から当該電極端子に前記超音波接合装置のホーンを当て、前記肉抜き部が4方を前記接合面に囲まれ、前記肉抜き部の周囲において超音波接合されるように、当該電極端子と、前記接合対象物とを超音波接合する工程と、
を備える、
半導体装置の製造方法。
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JP2014229486A JP6406983B2 (ja) | 2014-11-12 | 2014-11-12 | 半導体装置およびその製造方法 |
US14/830,248 US9484294B2 (en) | 2014-11-12 | 2015-08-19 | Semiconductor device and method of manufacturing the same |
DE102015220639.4A DE102015220639B4 (de) | 2014-11-12 | 2015-10-22 | Halbleitervorrichtung und Verfahren zum Herstellen derselben |
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JP4112816B2 (ja) * | 2001-04-18 | 2008-07-02 | 株式会社東芝 | 半導体装置および半導体装置の製造方法 |
JP4524570B2 (ja) * | 2004-03-10 | 2010-08-18 | 富士電機システムズ株式会社 | 半導体装置 |
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